diff --git a/lib/Support/CommandLine.cpp b/lib/Support/CommandLine.cpp
index 75b02d33..fa692be 100644
--- a/lib/Support/CommandLine.cpp
+++ b/lib/Support/CommandLine.cpp
@@ -354,7 +354,7 @@
     // we don't need to pass argc/argv in.
     assert(PGOpt->getValueExpectedFlag() != cl::ValueRequired &&
            "Option can not be cl::Grouping AND cl::ValueRequired!");
-    int Dummy;
+    int Dummy = 0;
     ErrorParsing |= ProvideOption(PGOpt, OneArgName,
                                   StringRef(), 0, 0, Dummy);